using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Results;

namespace Application.Features.Api.Developers.Apps.DeleteApp;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result>
{
    public async Task<Result> Handle(Command request, CancellationToken ct)
    {
        var app = await db.ApiApplication
            .AsTracking()
            .FirstOrDefaultAsync(c => c.ID == request.AppID && c.OwnerMemberID == request.OwnerMemberID, ct);

        if (app is null)
        {
            return Result.Failure(Error.NotFound("App.NotFound", "App not found."));
        }

        // Cascade delete: Configurations 에 OnDelete=Cascade 로 설정됨 → Credentials/Scopes/RateLimit 자동 삭제
        db.ApiApplication.Remove(app);
        await db.SaveChangesAsync(ct);

        return Result.Success();
    }
}